全国沿海城市均建有（）等供奉妈祖。
A.妈祖庙
B.天后宫
C.天妃宫
D.朝天宫
参考答案：A, B, C, D
She was so angry at ____ he was doing __ she walked out without a word.
A．what; that
B．that; what
C．that; that
D．what; what
现在市面上的1394采集卡有双芯和单芯之分，请问如何区别双芯片和单芯片，两者在性能及采集效果上有什么异同？
